Blackleading-machine.



PATENTED JULY 81, 1906.

W. H. NICHOLAS. BLACKLEADING MACHINE. APPLIOATION nun NOV.17, 190a.nmwnwnn JAN. 16, 1906.

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PATENTED JULY 31, 1906.. W. H. NICHOLAS. BLAGKLEADING MACHINE.APPLIOATIOK-IILED nbv. 17, 1903. nmwwnn um 1a, 1906.

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1 UNITED STATES WILLIAM H. NICHOLAS, OF BOSTON, MASSACHUSETTS.

BLACKLEADlNG-IVIACHINE.

Specification of Letters Patent.

Patented July 31, 1906.

- Application filed November 17, 1903. Renewed January 15, 1906. SerialNo. 296,163.

. To all whom it may concern:

Be it known that I, WILLIAM H. NICHOLAS, of Boston, in the county ofSuffolk and State of Massachusetts, have invented certain new and usefulIm rovements in Blackleading- Machines, of W 'ch the following is aspecification.

This invention relates to machines for applying powdered plumbago orblack-lead to wax molds prior to the electrot ping process and is an imrovement on that class of machines in whic the mold to be treated isreciprocated in close proximity to the outlet or outlets of a chamberinto which the powdered material is forced by air-pressure, the materialassing through said outlets, which are usual y in the form of narrowslots, onto the upper surface of the mold.

The invention has for its object first to enable the position of themold to be shifted at the end of each longitudinal movement, so

that the mold will occupy a different path when moving in one directionfrom that occupied byit when moving in the opposite direction to the endthat any portion or portions of the mold that may have failed to becoated with black-lead during one pass in consequence of obstructions inthe outlet or outlets of the chamber may be brought into position toreceive a coating from an unobstructed part of the said outlet oroutlets during the next pass.

The invention also has for its object to enable the mold to be moreconveniently inserted .in and removed from the casing which contains itduring the coating operation and with less liability of the escape andloss of powdered material through the opening which ermits the insertionand removal of the mo (1.

The invention consists in the improvements which I will now proceed todescribe and claim.

Of the accompanying drawings, forming a part of this specification,Figure 1 represents a top lan view of a blackleading-machine embo yingmy invention. Fig. 2 represents a longitudinal section on line 2 2 ofFig. 1. Fi 3 represents a top view showing the machine Wlth the cover orupper portion removed. Fig. 4 represents a section on line 4 4 of Fig.2. Fig. 5 represents a side elevation of a portion of the machine.

The same reference characters indicate the 5 same arts in all thefigures.

ing, and b represents a carriage which is re- I ciprocated horizontallyin the said casing by suitable means, such as a shaft 0, having;intersecting right and left screw-threads or ielical grooves c engaginga yoke 0 pivoted to the carriage, the arrangement being such that acontinuous rotation of the shaft 0 causes the carriage toreciprocatelengthwise of the shaft. The carria e is sup orted atopposite sides of the she t b guides or cars d d.

e represents a bed w ich supports the wax mold f to be coated and ismovable u onthe carriage b in a direction at right ang es with themovement of the carriage, the bed being guided in its movements byguides or shoul'- 4 ders b 1), formed on the carriage.

9 represents a chamber aflixed to the top of the casing a andcommunicating with the interior of the latter through narrow elongatedslots 7:. h, formed in a plate h, which constitutes the bottom of thechamber g and islocated in close proximity to the path of the moldPowdered plumbago is forced into the chamber 9 through a pipe 'i,communicating with the casing of a blower, (not shown,) the saidblower-casing receiving black-lead from the main casing a throughconduits j, which may constitute the legs or su ports for the casing a.I have not shown file connection between the conduits j and theblower-casing, it being sufficient to state that the said conduitscommunicate with the casing, so that black-lead entering the box a fromthe chamber g will be drawn into the blower-casing and will be forcedfrom the latter by the action of the blower through the pipe *5 back tothe chamber g.

k represents a deflector in the chamber g, arran ed to distribute theblast of the plumbagoaden air that enters the chamber through the pipei. It will be seen from the foregoing that jets of air carrying powderedplumbago pass continuously through the slots h h and impinge upon theupper surface of the mold f, the slots it being of such length that theyextend entirely across the mold, as indicated in Fig. 5 and by dottedlines in Fig. 1. The reciprocating motion of the mold is intended tocause a uniform distribution of the plumbago on the surface of the mold.It sometimes happens, however, that the slots h areobstructed in part bylumps or masses of plumbago or foreign matter so that the portions ofthe mold beneath the obstructed parts do not receive a proper coating.To

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obviate this difliculty, I provide means for changin the position of thebed e at the end of each ongitudinal movement, so that the bed whenmoving in one direction moves in a given path and when returning movesin a different path. The means here shown for causing the edgewisemovement of the bed comprise tw'o fixed cam-shaped bed-displacingmembers m m, one located at one side of the box near one end thereof andthe other at the opposite side of the box near the opposite end thereof,as shown in Fig. 3. These members m m cooperate with shoulders n n,afiixed to the bed. When the bed is moving in the direction of the arrowat in Fig. 3, the shoulder 11. strikes the cam m just before the end ofthe longitudinal movement, thus giv ing the bed and the mold thereon amovement in the direction of the arrow 'y. The movement of the carria einthe opposite direction brings the shouIder n in position to collidewith the cam m, and thus cause an edgewise movement of the bed in theopposite direction. By thus imparting movements to the bed crosswise ofthe path of movement of the carria e I insure a practically uniformcoating 0? the bed, regardless of local obstructions in the slots h.

0 represents an elongated opening at one side of the casing a, saidopening being so located as to permit the bed e and the mold thereon toslide edgewise into and out of the casing through said 0 ening, thelength of the opening being suc that the bed can be inserted and removedwhen the carriage is at any part of its movement. When the machine is inoperation, the opening 0 is closed by an elongated door 0, hinged at 0The door is held closed by movable catches 0 which are hinged at 0 tothe top of the casing. It will be seen that the bed e, arranged to bemoved edgewise upon the carriage, enables the opening provided for theinsertion and removal of the mold to be made of minimum width andlocated in one of the vertical sides of the casing. The area of the saidopening is therefore much less than would be required if the opening anddoor were at the top of the casing. Hence there is much less scatteringand waste of powdered material when the door is opened than heretofore.

I claim 1. In a machine of the character stated, the combination of abox, a carriage movable therein, means for reciprocatin the carriage, amold-supporting bed movab e on the carriage crosswise of the ath ofmovement of the latter, means for sl iifting the position of the bed atpredetermined intervals, whereby the bed is caused to move in differentparallel paths, and means for applying powdered material to a mold onthe bed.

2. In a machine of the character stated, the combination of a box, acarriage movable therein, means for reciprocating the carriage, amold-supportin bed movable on the carriage crosswise o the path ofmovement of the latter, and bed-displacing members on the inner sides ofthe box arranged to act alternately in moving the bed crosswise of thepath of movement of the carriage.

3. In a machine of the character stated, the combination of a box, acarriage movable therein, means for reciprocatin the carriage, amold-supporting bed movab e on the carriage crosswise of the path ofmovement of the latter, the bed being removable horizon tally, entirelyaway from the carriage, a longitudinal o ening in one side of the boxcoinciding Wit the path in which the bed is moved by the carriage, saidopening extending below the bottom of the bed and above the top of themold, so that the bed and the mold thereon may be moved horizontally toand from the carriage through said opening, and a door to close saidopening.

In testimony whereof I have affixed my signature in presence of twowitnesses.

WILLIAM H. NICHOLAS. Witnesses O. F. BROWN, E. BATCHELDER.

